The Silicon Vertex Detector of the Belle II Experiment

Higuchi, Takeo; Aihara, H.; Aziz, T.; Bacher, S.; Bahinipati, S.; Barberio, E.; Baroncelli, Ti.; Baroncelli, To.; Batignani, Giovanni; Bauer, A.; Bertacchi, V.; Bettarini, S.; Bhuyan, B.; Bilka, T.; Bosi, F.; Bosisio, L.; Bozek, A.; Buchsteiner, F.; Caria, G.; Casarosa, G.; Ceccanti, M.; Cervenkov, D.; Czank, T.; Dash, N.; Doleal, Z.; Forti, F.; Friedl, M.; Gobbo, B.; Hara, K.; Irmler, C.; Ishikawa, Akimasa; Joo, C.; Kaleta, M.; Kandra, J.; Kodyš, P.; Kohriki, T.; Komarov, I.; Kumar, M.; Kumar, R.; Kun, W.; Kvasnicka, P.; Lalwani, K.; Lanceri, L.; Li, Y.; Libby, J.; Lueck, T.; Mammini, P.; Martini, A.; Morii, T.; Natkaniec, Z.; Onuki, Y.; Ostrowicz, W.; Paladino, A.; Paoloni, E.; Park, H.; Prasanth, K.; Profeti, A.; Rashevskaya, I.; Rizzo, G.; Rozanska, M.; Sahoo, D.; Sasaki, J.; Sato, N.; Schultschik, S.; Schwanda, C.; Stypula, J.; Suzuki, J.; Tanaka, S.; Tanigawa, H.; Thalmeier, R.; Tsuboyama, T.; Urquijo, P.; Vitale, L.; Watanabe, M.; Watanuki, S.; Webb, J.; Wiechczynski, J.; Williams, S.; Yin, H.; Zani, L.; Basith, A. K.; Grimaldo, J. A. M.; Kang, K. H.; La Licata, C.; Lee, J. Y.; Lee, S. C.; Mayekar, S. N.; Mohanty, G. B.; Nakamura, K. R.; Rao, K. K.; Resmi, P. K.; Taylor, G. N.; Watson, I. J.

doi:10.22323/1.348.0024

The silicon vertex detector (SVD) for the Belle II experiment at the SuperKEKB accelerator in Japan is responsible for detecting particle's origins. It comprises four cylindrical layers with ladder-like double-sided silicon detector (DSSD) arrays on each layer. The ladders produced under a stringent quality control showed good mechanical tolerance with a DSSD distortion <~300um and with an electrical efficiency >99%. The SVD was commissioned with cosmic-ray events for two months. Cluster-finding efficiency was estimated in the commissioning to be >98.5%. The commissioned SVD had been installed on the Belle~II detector. The so-called "phase 3" of the experiment with the SVD will start in March 2019.

The Silicon Vertex Detector of the Belle II Experiment / Higuchi, Takeo; Aihara, H.; Aziz, T.; Bacher, S.; Bahinipati, S.; Barberio, E.; Baroncelli, Ti.; Baroncelli, To.; Batignani, Giovanni; Bauer, A.; Bertacchi, V.; Bettarini, S.; Bhuyan, B.; Bilka, T.; Bosi, F.; Bosisio, L.; Bozek, A.; Buchsteiner, F.; Caria, G.; Casarosa, G.; Ceccanti, M.; Cervenkov, D.; Czank, T.; Dash, N.; Doleal, Z.; Forti, F.; Friedl, M.; Gobbo, B.; Hara, K.; Irmler, C.; Ishikawa, Akimasa; Joo, C.; Kaleta, M.; Kandra, J.; Kodyš, P.; Kohriki, T.; Komarov, I.; Kumar, M.; Kumar, R.; Kun, W.; Kvasnicka, P.; Lalwani, K.; Lanceri, L.; Li, Y.; Libby, J.; Lueck, T.; Mammini, P.; Martini, A.; Morii, T.; Natkaniec, Z.; Onuki, Y.; Ostrowicz, W.; Paladino, A.; Paoloni, E.; Park, H.; Prasanth, K.; Profeti, A.; Rashevskaya, I.; Rizzo, G.; Rozanska, M.; Sahoo, D.; Sasaki, J.; Sato, N.; Schultschik, S.; Schwanda, C.; Stypula, J.; Suzuki, J.; Tanaka, S.; Tanigawa, H.; Thalmeier, R.; Tsuboyama, T.; Urquijo, P.; Vitale, L.; Watanabe, M.; Watanuki, S.; Webb, J.; Wiechczynski, J.; Williams, S.; Yin, H.; Zani, L.; Basith, A. K.; Grimaldo, J. A. M.; Kang, K. H.; La Licata, C.; Lee, J. Y.; Lee, S. C.; Mayekar, S. N.; Mohanty, G. B.; Nakamura, K. R.; Rao, K. K.; Resmi, P. K.; Taylor, G. N.; Watson, I. J.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - (2019), p. 024. [10.22323/1.348.0024]